A spinal medical teaching model

Abstract

The utility model discloses a kind of spinal column medical teaching models, specifically related to medical teaching technical field, comprising: between adjacent cervical vertebrae, between adjacent thoracic vertebrae and between adjacent lumbar vertebrae are all fixedly connected by intervertebral disc;Cervical vertebra assembly is detachably connected with thoracic vertebra assembly by connecting mechanism, thoracic vertebra assembly is detachably connected with lumbar vertebra assembly by connecting mechanism, and lumbar vertebra assembly is detachably connected with sacral vertebra assembly by connecting mechanism;And, pressure monitoring system, the pressure monitoring system is used to monitor the pressure received by the surface of several intervertebral discs.The utility model detachably connects cervical vertebra assembly and thoracic vertebra assembly, thoracic vertebra assembly and lumbar vertebra assembly and lumbar vertebra assembly and sacral vertebra assembly;Realize the quick assembly between the components of teaching model: convenient for modular teaching demonstration;Adjacent vertebral body is all fixedly connected by intervertebral disc, guaranteeing mechanical stability: withstands torsional load when side bending angle is adjusted.

Description

Technical Field

[0001] This utility model relates to the field of medical teaching technology, and more specifically, to a spinal medical teaching model. Background Technology

[0002] Existing spinal teaching aids are mainly used for teaching and demonstration in basic medical fields such as anatomy and sports rehabilitation. However, in actual use, traditional models are too simplified and cannot capture the complex three-dimensional biomechanical changes caused by spinal diseases such as scoliosis (especially different Cobb angles), kyphosis, and lumbar spondylolisthesis. In other words, existing teaching aids are difficult to demonstrate the three-dimensional force line changes and pressure distribution of spinal diseases such as scoliosis, kyphosis, and lumbar spondylolisthesis. Therefore, in order to realistically simulate the three-dimensional force line changes of the spine in scoliosis, kyphosis, and other states, and to facilitate students' understanding of mechanical transmission, a spinal medical teaching model is proposed as a further improvement. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the embodiments of this utility model provide a spinal medical teaching model to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a spinal medical teaching model, comprising:

[0005] A cervical spine assembly comprising at least seven cervical vertebrae;

[0006] Thoracic vertebral assembly, which includes at least twelve thoracic vertebral bodies;

[0007] A lumbar spine assembly comprising at least five lumbar vertebral bodies;

[0008] A sacral assembly, which includes at least one sacral vertebra;

[0009] Intervertebral discs are used to fix and connect adjacent cervical vertebrae, adjacent thoracic vertebrae, and adjacent lumbar vertebrae.

[0010] A connecting mechanism is provided, wherein one end of the cervical spine assembly is detachably connected to one end of the thoracic spine assembly via a connecting mechanism, the other end of the thoracic spine assembly is detachably connected to one end of the lumbar spine assembly via a connecting mechanism, and the other end of the lumbar spine assembly is detachably connected to one end of the sacral spine assembly via a connecting mechanism; and,

[0011] A pressure monitoring system is used to monitor the pressure on the surface of several intervertebral discs.

[0012] Furthermore, the connecting mechanism includes: an upper connecting member and a lower connecting member;

[0013] The top of the upper connector is fixedly connected to the bottom of the corresponding cervical spine assembly, thoracic spine assembly, or lumbar spine assembly, and the bottom of the lower connector is fixedly connected to the corresponding thoracic spine assembly, lumbar spine assembly, or sacral spine assembly.

[0014] The upper connector has a rotating slot on one side and a through slot communicating with the rotating slot at the bottom. The lower connector has a buckle rotatably connected to its top. The top of the lower connector passes through the through slot, and the buckle passes through the through slot and engages with the rotating slot.

[0015] Furthermore, the inner wall of the top of the rotating slot is inlaid with a magnet, and the buckle is made of metal.

[0016] Furthermore, the lower connector, buckle, and through groove are all elliptical in shape, and the thickness of the buckle is the same as the height of the rotating groove.

[0017] Furthermore, the intervertebral disc is made of silicone, and the cervical vertebrae, thoracic vertebrae, lumbar vertebrae, and sacral vertebrae are all made of transparent resin.

[0018] Furthermore, the pressure monitoring system includes:

[0019] A pressure sensor is attached to the outer surface of the intervertebral disc, and several of the pressure sensors are in contact with the corresponding cervical vertebral body, thoracic vertebral body, lumbar vertebral body, or sacral vertebra; and,

[0020] LED lights are fixedly installed inside the cervical, thoracic, lumbar, and sacral vertebrae. The pressure sensor is connected to the corresponding LED light signal via a PLC control module.

[0021] The signal output terminal of the pressure sensor is connected to the signal input terminal of the PLC control module, and the signal output terminal of the PLC control module is connected to the signal input terminal of the corresponding LED light.

[0022] The technical effects and advantages of this utility model are as follows:

[0023] 1. Compared with existing technologies, by setting up a connecting mechanism, the cervical spine component can be detachably connected to the thoracic spine component, the thoracic spine component can be detachably connected to the lumbar spine component, and the lumbar spine component can be detachably connected to the sacral spine component; this achieves modularization of the teaching model, allowing for rapid assembly and stable connection between components, and also providing reusability; it facilitates modular teaching demonstrations; adjacent vertebrae are fixedly connected by intervertebral discs, and since they are not detachable, mechanical stability is guaranteed; the intervertebral discs are used to ensure that the model can withstand torsional loads during lateral bending angle adjustments.

[0024] 2. Compared with existing technologies, by setting up a pressure monitoring system, multiple pressure sensors on the intervertebral discs transmit the pressure information of the vertebral body on the intervertebral discs to the PLC control module via conventional wireless transmission technology. The PLC control module compares the information with preset pressure thresholds. If the pressure value measured by any of the pressure sensors exceeds the pressure threshold, the PLC control module sends a wireless signal to the LED lights inside the vertebral body (cervical vertebral body LED lights, thoracic vertebral body LED lights, lumbar vertebral body LED lights, or sacral vertebral body LED lights) in contact with that pressure sensor. The corresponding LED light then changes from being off to illuminating yellow or red according to the pressure level. This simulates the three-dimensional force line changes of the spine in states such as scoliosis and kyphosis, facilitating students' understanding of mechanical transmission and the positional changes and pressures borne by the vertebral body during spinal diseases such as scoliosis. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0026] Figure 2 This is a schematic diagram of the structure of the cervical spine component of this utility model connected to the thoracic spine component via a connecting mechanism.

[0027] Figure 3 This is a schematic diagram showing the connection between the thoracic spine assembly, lumbar spine assembly, and sacral spine assembly of this utility model.

[0028] Figure 4 This is a schematic diagram of the connection mechanism of this utility model.

[0029] Figure 5 This is a schematic diagram of the structure of the upper connector of this utility model.

[0030] Figure 6 This is a schematic diagram of the signal transmission of the pressure monitoring system of this utility model.

[0031] The attached figures are labeled as follows:

[0032] 10. Cervical spine assembly; 11. Cervical vertebral body; 20. Thoracic spine assembly; 21. Thoracic vertebral body; 30. Lumbar spine assembly; 31. Lumbar vertebral body; 40. Sacral spine assembly; 41. Sacral vertebra; 50. Intervertebral disc; 60. Connecting mechanism; 61. Upper connector; 611. Rotating slot; 612. Through slot; 62. Lower connector; 621. Buckle; 70. Pressure monitoring system; 71. Pressure sensor; 72. LED light; 73. PLC control module. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0034] As attached Figure 1 Appendix Figure 2 and attached Figure 3 The spinal medical teaching model shown includes:

[0035] Cervical spine assembly 10, which includes at least seven cervical vertebrae 11;

[0036] Thoracic vertebral assembly 20, which includes at least twelve thoracic vertebral bodies 21;

[0037] Lumbar spine assembly 30, which includes at least five lumbar vertebral bodies 31;

[0038] Sacral assembly 40, which includes at least one sacral vertebra 41;

[0039] Intervertebral disc 50 is used to fix and connect adjacent cervical vertebral bodies 11, adjacent thoracic vertebral bodies 21, and adjacent lumbar vertebral bodies 31.

[0040] The connecting mechanism 60 allows for the detachable connection of one end of the cervical spine component 10 to one end of the thoracic spine component 20; the end of the thoracic spine component 20 away from the cervical spine component 10 is detachably connected to one end of the lumbar spine component 30 via the connecting mechanism 60; and the end of the lumbar spine component 30 away from the thoracic spine component 20 is detachably connected to one end of the sacral spine component 40 via the connecting mechanism 60.

[0041] Pressure monitoring system 70 is used to monitor the pressure on the surface of several intervertebral discs 50.

[0042] The cervical spine component 10, thoracic spine component 20, lumbar spine component 30, and sacral spine component 40 are detachably connected to each other, realizing the modularization of the teaching model. The components can be quickly assembled and stably connected, and are reusable, which facilitates modular teaching demonstrations. The cervical spine component 10, composed of multiple cervical vertebrae 11, the thoracic spine component 20, composed of multiple thoracic vertebrae 21, and the lumbar spine component 30, composed of multiple lumbar vertebrae 31, are all fixedly connected to adjacent vertebrae through intervertebral discs 50. Since they are not detachable, mechanical stability is ensured. The intervertebral discs 50 are used to ensure that the torsional load during the adjustment of the lateral bending angle is withstood.

[0043] The pressure sensor 71 of the pressure monitoring system 70 is located on the intervertebral disc 50, and the LED light 72 is located in the vertebral body of each component. Therefore, the pressure sensor 71 and the LED light 72 are not affected when the relevant components are disassembled. Each vertebral body has a battery that provides power to the LED light 72, and each intervertebral disc 50 has a battery that provides power to the pressure sensor 71. This ensures that the pressure sensor 71 and the LED light 72 are powered even when the components are disassembled. That is, the cervical spine component 10, the thoracic spine component 20, the lumbar spine component 30, and the sacral spine component 40 can operate independently.

[0044] In a preferred embodiment, as shown in the appendix Figure 4 and attached Figure 5 As shown, the connecting mechanism 60 includes: an upper connecting member 61 and a lower connecting member 62;

[0045] The top of the upper connector 61 is fixedly connected to the bottom of the corresponding cervical spine component 10, thoracic spine component 20 or lumbar spine component 30, and the bottom of the lower connector 62 is fixedly connected to the corresponding thoracic spine component 20, lumbar spine component 30 or sacral spine component 40.

[0046] That is, the upper connector 61 fixedly installed at the bottom of the cervical spine component 10 is connected to the lower connector 62 installed at the top of the thoracic spine component 20;

[0047] The upper connector 61 fixedly installed at the bottom of the thoracic vertebral component 20 is connected to the lower connector 62 installed at the top of the lumbar vertebral component 30;

[0048] The upper connector 61 fixedly installed at the bottom of the lumbar spine component 30 is connected to the lower connector 62 installed at the top of the sacral spine component 40;

[0049] The upper connector 61 has a rotating slot 611 on one side, and a through slot 612 communicating with the rotating slot 611 is provided at the bottom of the upper connector 61. The top of the lower connector 62 is rotatably connected with a buckle 621, and the top of the lower connector 62 passes through the through slot 612. The buckle 621 passes through the through slot 612 and engages with the rotating slot 611.

[0050] The buckle 621 engages with the rotating slot 611 to ensure the mechanical stability of the connection between the upper connector 61 and the lower connector 62.

[0051] The upper connector 61 is made of hard resin with a hardness of HB15-20, so that the upper connector 61 provides a mechanical support frame, and the through groove 612 of the upper connector 61 is the track for the sliding of the buckle 621.

[0052] In a preferred embodiment, as shown in the appendix Figure 4 and attached Figure 5 As shown, a magnet is embedded in the inner wall of the top of the rotating slot 611, and the buckle 621 is made of metal.

[0053] The magnet is a neodymium iron boron magnet with a diameter of 3mm to enable quick adsorption and positioning of the buckle 621 and the magnet. The metal buckle 621 engages with the rotating slot 611 to lock and prevent detachment, and has the ability to resist lateral shear force. The structure is required to bear a load of at least 5kg.

[0054] The upper connector 61 and the lower connector 62 form a dual locking mechanism:

[0055] Level 1 lock: The magnet and metal material latch 621 magnetic attraction maintain the base fixation;

[0056] Secondary lock: The latch 621 engages with the rotating slot 611 to resist external vibration or torsion;

[0057] In a preferred embodiment, as shown in the appendix Figure 1 Appendix Figure 2 and attached Figure 3 As shown, the lower connector 62, the buckle 621, and the through groove 612 are all elliptical in shape, and the thickness of the buckle 621 is the same as the height of the rotating groove 611; so that the buckle 621 is located in the rotating groove 611, which can ensure that the connection between the upper connector 61 and the lower connector 62 is stable and not easy to fall off.

[0058] In a preferred embodiment, as shown in the appendix Figure 1 Appendix Figure 2 and attached Figure 3 As shown, the intervertebral disc 50 is made of silicone, while the cervical vertebral body 11, thoracic vertebral body 21, lumbar vertebral body 31, and sacral vertebral body 41 are all made of transparent resin. This allows light to pass through the cervical vertebral body 11, thoracic vertebral body 21, lumbar vertebral body 31, and sacral vertebral body 41. This design works in conjunction with the LED light 72, so that the light source provided by the LED light 72 passes through the cervical vertebral body 11, thoracic vertebral body 21, lumbar vertebral body 31, and sacral vertebral body 41. In other words, the pressure changes can be easily observed by students based on the changes in the light from the LED light 72.

[0059] In a preferred embodiment, as shown in the appendix Figure 6 As shown, the pressure monitoring system 70 includes:

[0060] Pressure sensor 71 is attached to the outer surface of intervertebral disc 50, and several pressure sensors 71 respectively contact the corresponding cervical vertebral body 11, thoracic vertebral body 21, lumbar vertebral body 31 or sacral vertebral body 41; and,

[0061] LED lights 72 are fixedly installed inside the cervical vertebral body 11, thoracic vertebral body 21, lumbar vertebral body 31 and sacral vertebral body 41. Pressure sensors 71 are connected to the corresponding LED lights 72 via PLC control module 73.

[0062] The signal output terminal of the pressure sensor 71 is connected to the signal input terminal of the PLC control module 73, and the signal output terminal of the PLC control module 73 is connected to the signal input terminal of the corresponding LED 72.

[0063] Example: If the cervical spine assembly 10 has seven cervical vertebrae 11, then there are 6 intervertebral discs 50; each intervertebral disc 50 is fitted with a pressure sensor 71 between it and the two cervical vertebrae 11 in contact with it; each cervical vertebrae 11 is equipped with an LED light 72; each cervical vertebrae 11, intervertebral disc 50, pressure sensor 71 and LED light 72 are numbered.

[0064] The seven cervical vertebrae 11 are arranged from top to bottom as follows: A1, A2, A3, A4, A5, A6, A7; and the six intervertebral discs 50 are arranged from top to bottom as follows: B1, B2, B3, B4, B5, B6.

[0065] The pressure sensors 71 on B1, B2, B3, B4, B5, and B6 are respectively set as A1 B1, B1A2, A2B2, B2A3, A3B3, B3A4, A4B4, B4A5, A5B5, B5A6, A6B6, and B6A7;

[0066] The LED lights 72 inside A1, A2, A3, A4, A5, A6, and A7 are respectively set to a1, a2, a3, a4, a5, a6, and a7;

[0067] The pressure data measured by pressure sensors 71 (numbered A1 and B1) is then fed back to the PLC control module 73 (via wires / FPC within the miniature channel). If the pressure data exceeds a preset threshold x of the PLC control module 73, the PLC control module 73 feeds back (via the built-in wireless module) to LED 72 (numbered a1), causing LED 72 to light up yellow. If the pressure data exceeds the preset threshold y of x by a factor of y, LED 72 lights up red. If the pressure data is less than the preset threshold x of the PLC control module 73, LED 72 remains off.

[0068] Pressure data measured by pressure sensor 71 (numbered B1A2) is fed back to PLC control module 73 (via wires / FPC in the miniature channel). If the pressure data exceeds a preset threshold of PLC control module 73, PLC control module 73 feeds back (via built-in wireless module) to LED 72 (numbered a2), and LED 72 lights up yellow. If the pressure data exceeds the preset threshold of PLC control module 73 by more than x, LED 72 lights up red. If the pressure data is less than the preset threshold x of PLC control module 73, LED 72 does not light up.

[0069] Pressure data measured by pressure sensor 71 (numbered A2B2) is fed back to PLC control module 73 (via wires / FPC in the miniature channel). If the pressure data exceeds a preset threshold of PLC control module 73, PLC control module 73 feeds back (via built-in wireless module) to LED 72 of a2, and LED 72 lights up yellow. If the pressure data exceeds the preset threshold of x by y, LED 72 lights up red. If the pressure data is less than the preset threshold x, LED 72 does not light up.

[0070] Similarly, pressure sensors 71 numbered B2A3, A3B3, B3A4, A4B4, B4A5, A5B5, B5A6, A6B6, and B6A7 are sequentially connected to LED lights 72 numbered a3, a3, a4, a4, a5, a5, a6, a6, and a7 via PLC control module 73; and these signals are connected in parallel.

[0071] The pressure sensor 71 is a miniature piezoelectric thin film sensor such as a MEMS sensor; the pressure sensor 71 contacts the edge of the corresponding vertebral body end, thereby obtaining the pressure between the vertebral body and the adjacent intervertebral disc 50.

[0072] Similarly, the thoracic vertebrae assembly 20 uses twelve thoracic vertebrae 21; the lumbar vertebrae assembly 30 uses five lumbar vertebrae 31; and the sacral vertebrae assembly 40 uses one sacral vertebra 41. Thus, there are 6 intervertebral discs 50 in the seven cervical vertebrae 11, 11 intervertebral discs 50 in the twelve thoracic vertebrae 21, and 4 intervertebral discs 50 in the five lumbar vertebrae 31. The pressure sensor 71 and the LED light 72 are connected according to the above signal.

[0073] The pressure sensor 71 on the intervertebral disc 50 can feed the pressure data measured by the pressure sensor 71 back to the PLC control module 73 via a flexible printed circuit (FPC). Multiple pressure sensors 71 are connected in parallel to transmit the data to the PLC control module 73. The PLC control module 73 compares the pressure values ​​fed back by each pressure sensor 71. When the pressure exceeds a threshold, the LED light 72 displays different colors according to the pressure magnitude to identify pressure changes and help students understand mechanical transmission. The signal output terminal of the PLC control module 73 can also be connected to the signal input terminal of an alarm. That is, when the pressure value fed back by the pressure sensor 71 exceeds the threshold, the alarm is triggered.

[0074] The sensor data acquired by the pressure sensor 71 can be wirelessly transmitted to the PLC control module 73 via conventional Bluetooth technology.

[0075] The working principle of this utility model is as follows: During installation, if the cervical spine component 10 and the thoracic spine component 20 are assembled, the upper connector 61 fixedly installed at the bottom of the cervical spine component 10 and the lower connector 62 installed at the top of the thoracic spine component 20 are brought close together. At this time, the magnet embedded in the rotating slot 611 of the upper connector 61 generates a strong attraction force to attract the buckle 621 of the lower connector 62. Thus, the buckle 621 of the lower connector 62 can be easily inserted into the rotating slot 611 of the upper connector 61, realizing quick installation and positioning. Then, the rotating buckle 621 engages with the rotating slot 611, thereby realizing the connection and assembly of the cervical spine component 10 and the thoracic spine component 20.

[0076] Similarly, the connection and assembly of the thoracic vertebrae 20 and the lumbar vertebrae 30 and the connection and assembly of the lumbar vertebrae 30 and the sacral vertebrae 40 can be carried out in the same way;

[0077] In use, the pressure monitoring system 70 monitors the pressure distribution of each component. Multiple pressure sensors 71 on the intervertebral disc 50 transmit the obtained pressure information to the PLC control module 73 via conventional wireless transmission technology. The PLC control module 73 compares this information with a preset pressure threshold. If any pressure sensor 71 detects a pressure value exceeding the threshold, the PLC control module 73 transmits the information wirelessly to the LED lights inside the vertebral body (Cervical vertebral body 11 internal LED light, Thoracic vertebral body 21 internal LED light) in contact with that pressure sensor 71. LED lights (LED lights inside the 31st lumbar vertebra or the 41st sacral vertebra), and then the corresponding LED lights inside the vertebrae (LED lights inside the 11th cervical vertebra, the 21st thoracic vertebra, the 31st lumbar vertebra, or the 41st sacral vertebra) change from being off to illuminating yellow or red lights according to the pressure level; thus simulating the three-dimensional force line changes of the spine in states such as scoliosis and kyphosis, making it easier for students to understand the force transmission and the positional changes and pressures borne by the vertebrae when spinal diseases such as scoliosis occur.

[0078] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0079] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spinal medical teaching model, characterized by: include: A cervical spine assembly (10) comprising at least seven cervical vertebrae (11); Thoracic vertebral assembly (20), which includes at least twelve thoracic vertebral bodies (21); A lumbar spine assembly (30) comprising at least five lumbar vertebral bodies (31); A sacral assembly (40) comprising at least one sacral vertebra (41); Intervertebral disc (50) is used to fix and connect adjacent cervical vertebrae (11), adjacent thoracic vertebrae (21), and adjacent lumbar vertebrae (31). A connecting mechanism (60) is provided, wherein one end of the cervical spine assembly (10) is detachably connected to one end of the thoracic spine assembly (20) via a connecting mechanism (60), the other end of the thoracic spine assembly (20) is detachably connected to one end of the lumbar spine assembly (30) via a connecting mechanism (60), and the other end of the lumbar spine assembly (30) is detachably connected to one end of the sacral spine assembly (40) via a connecting mechanism (60); and, A pressure monitoring system (70) is used to monitor the pressure on the surface of several intervertebral discs (50).

2. The spinal medical teaching model according to claim 1, characterized in that: The connecting mechanism (60) includes: an upper connector (61) and a lower connector (62); The top of the upper connector (61) is fixedly connected to the bottom of the corresponding cervical spine assembly (10), thoracic spine assembly (20) or lumbar spine assembly (30), and the bottom of the lower connector (62) is fixedly connected to the corresponding thoracic spine assembly (20), lumbar spine assembly (30) or sacral spine assembly (40). The upper connector (61) has a rotating slot (611) on one side, and a through slot (612) communicating with the rotating slot (611) is provided at the bottom of the upper connector (61). The top of the lower connector (62) is rotatably connected with a buckle (621). The top of the lower connector (62) passes through the through slot (612), and the buckle (621) passes through the through slot (612) and engages with the rotating slot (611).

3. The spinal medical teaching model according to claim 2, characterized in that: The inner wall of the top of the rotating slot (611) is inlaid with a magnet, and the buckle (621) is made of metal.

4. A spinal medical teaching model according to claim 3, wherein: The lower connector (62), buckle (621) and through groove (612) are all elliptical in shape, and the thickness of the buckle (621) is the same as the height of the rotating groove (611).

5. The spinal medical teaching model of claim 1, wherein: The intervertebral disc (50) is made of silicone, and the cervical vertebral body (11), thoracic vertebral body (21), lumbar vertebral body (31) and sacral vertebra (41) are all made of transparent resin.

6. A spinal medical teaching model as claimed in claim 1, wherein: The pressure monitoring system (70) includes: A pressure sensor (71) is attached to the outer surface of the intervertebral disc (50), and several of the pressure sensors (71) are in contact with the corresponding cervical vertebral body (11), thoracic vertebral body (21), lumbar vertebral body (31), or sacral vertebra (41); and, LED lights (72) are fixedly installed inside the cervical vertebrae (11), thoracic vertebrae (21), lumbar vertebrae (31) and sacral vertebrae (41). The pressure sensor (71) is connected to the corresponding LED light (72) via a PLC control module (73). The signal output terminal of the pressure sensor (71) is connected to the signal input terminal of the PLC control module (73), and the signal output terminal of the PLC control module (73) is connected to the signal input terminal of the corresponding LED light (72).

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